From 4246c7a523451e1499a3b2b9d71d5360457b1294 Mon Sep 17 00:00:00 2001
From: syeopite <syeopite@syeopite.dev>
Date: Mon, 11 Oct 2021 13:22:11 -0700
Subject: [PATCH] Extract image routes

---
 src/invidious.cr               | 195 ++-------------------------------
 src/invidious/routes/images.cr | 191 ++++++++++++++++++++++++++++++++
 2 files changed, 198 insertions(+), 188 deletions(-)
 create mode 100644 src/invidious/routes/images.cr

diff --git a/src/invidious.cr b/src/invidious.cr
index 73abe6b0..18ec0b97 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -389,6 +389,13 @@ end
   Invidious::Routing.post "/feed/webhook/:token", Invidious::Routes::Feeds, :push_notifications_post
 {% end %}
 
+Invidious::Routing.get "/ggpht/*", Invidious::Routes::Images, :ggpht
+Invidious::Routing.options "/sb/:authority/:id/:storyboard/:index", Invidious::Routes::Images, :options_storyboard
+Invidious::Routing.get "/sb/:authority/:id/:storyboard/:index", Invidious::Routes::Images, :get_storyboard
+Invidious::Routing.get "/s_p/:id/:name", Invidious::Routes::Images, :s_p_image
+Invidious::Routing.get "/yts/img/:name", Invidious::Routes::Images, :yts_image
+Invidious::Routing.get "/vi/:id/:name", Invidious::Routes::Images, :thumbnails
+
 # API routes (macro)
 define_v1_api_routes()
 
@@ -1273,194 +1280,6 @@ post "/api/v1/auth/notifications" do |env|
   create_notification_stream(env, topics, connection_channel)
 end
 
-get "/ggpht/*" do |env|
-  url = env.request.path.lchop("/ggpht")
-
-  headers = HTTP::Headers{":authority" => "yt3.ggpht.com"}
-  REQUEST_HEADERS_WHITELIST.each do |header|
-    if env.request.headers[header]?
-      headers[header] = env.request.headers[header]
-    end
-  end
-
-  begin
-    YT_POOL.client &.get(url, headers) do |response|
-      env.response.status_code = response.status_code
-      response.headers.each do |key, value|
-        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-          env.response.headers[key] = value
-        end
-      end
-
-      env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-      if response.status_code >= 300
-        env.response.headers.delete("Transfer-Encoding")
-        break
-      end
-
-      proxy_file(response, env)
-    end
-  rescue ex
-  end
-end
-
-options "/sb/:authority/:id/:storyboard/:index" do |env|
-  env.response.headers["Access-Control-Allow-Origin"] = "*"
-  env.response.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
-  env.response.headers["Access-Control-Allow-Headers"] = "Content-Type, Range"
-end
-
-get "/sb/:authority/:id/:storyboard/:index" do |env|
-  authority = env.params.url["authority"]
-  id = env.params.url["id"]
-  storyboard = env.params.url["storyboard"]
-  index = env.params.url["index"]
-
-  url = "/sb/#{id}/#{storyboard}/#{index}?#{env.params.query}"
-
-  headers = HTTP::Headers.new
-
-  headers[":authority"] = "#{authority}.ytimg.com"
-
-  REQUEST_HEADERS_WHITELIST.each do |header|
-    if env.request.headers[header]?
-      headers[header] = env.request.headers[header]
-    end
-  end
-
-  begin
-    YT_POOL.client &.get(url, headers) do |response|
-      env.response.status_code = response.status_code
-      response.headers.each do |key, value|
-        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-          env.response.headers[key] = value
-        end
-      end
-
-      env.response.headers["Connection"] = "close"
-      env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-      if response.status_code >= 300
-        env.response.headers.delete("Transfer-Encoding")
-        break
-      end
-
-      proxy_file(response, env)
-    end
-  rescue ex
-  end
-end
-
-get "/s_p/:id/:name" do |env|
-  id = env.params.url["id"]
-  name = env.params.url["name"]
-
-  url = env.request.resource
-
-  headers = HTTP::Headers{":authority" => "i9.ytimg.com"}
-  REQUEST_HEADERS_WHITELIST.each do |header|
-    if env.request.headers[header]?
-      headers[header] = env.request.headers[header]
-    end
-  end
-
-  begin
-    YT_POOL.client &.get(url, headers) do |response|
-      env.response.status_code = response.status_code
-      response.headers.each do |key, value|
-        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-          env.response.headers[key] = value
-        end
-      end
-
-      env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-      if response.status_code >= 300 && response.status_code != 404
-        env.response.headers.delete("Transfer-Encoding")
-        break
-      end
-
-      proxy_file(response, env)
-    end
-  rescue ex
-  end
-end
-
-get "/yts/img/:name" do |env|
-  headers = HTTP::Headers.new
-  REQUEST_HEADERS_WHITELIST.each do |header|
-    if env.request.headers[header]?
-      headers[header] = env.request.headers[header]
-    end
-  end
-
-  begin
-    YT_POOL.client &.get(env.request.resource, headers) do |response|
-      env.response.status_code = response.status_code
-      response.headers.each do |key, value|
-        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-          env.response.headers[key] = value
-        end
-      end
-
-      env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-      if response.status_code >= 300 && response.status_code != 404
-        env.response.headers.delete("Transfer-Encoding")
-        break
-      end
-
-      proxy_file(response, env)
-    end
-  rescue ex
-  end
-end
-
-get "/vi/:id/:name" do |env|
-  id = env.params.url["id"]
-  name = env.params.url["name"]
-
-  headers = HTTP::Headers{":authority" => "i.ytimg.com"}
-
-  if name == "maxres.jpg"
-    build_thumbnails(id).each do |thumb|
-      if YT_POOL.client &.head("/vi/#{id}/#{thumb[:url]}.jpg", headers).status_code == 200
-        name = thumb[:url] + ".jpg"
-        break
-      end
-    end
-  end
-  url = "/vi/#{id}/#{name}"
-
-  REQUEST_HEADERS_WHITELIST.each do |header|
-    if env.request.headers[header]?
-      headers[header] = env.request.headers[header]
-    end
-  end
-
-  begin
-    YT_POOL.client &.get(url, headers) do |response|
-      env.response.status_code = response.status_code
-      response.headers.each do |key, value|
-        if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
-          env.response.headers[key] = value
-        end
-      end
-
-      env.response.headers["Access-Control-Allow-Origin"] = "*"
-
-      if response.status_code >= 300 && response.status_code != 404
-        env.response.headers.delete("Transfer-Encoding")
-        break
-      end
-
-      proxy_file(response, env)
-    end
-  rescue ex
-  end
-end
-
 get "/Captcha" do |env|
   headers = HTTP::Headers{":authority" => "accounts.google.com"}
   response = YT_POOL.client &.get(env.request.resource, headers)
diff --git a/src/invidious/routes/images.cr b/src/invidious/routes/images.cr
new file mode 100644
index 00000000..bb924cdf
--- /dev/null
+++ b/src/invidious/routes/images.cr
@@ -0,0 +1,191 @@
+module Invidious::Routes::Images
+  # Avatars, banners and other large image assets.
+  def self.ggpht(env)
+    url = env.request.path.lchop("/ggpht")
+
+    headers = HTTP::Headers{":authority" => "yt3.ggpht.com"}
+    REQUEST_HEADERS_WHITELIST.each do |header|
+      if env.request.headers[header]?
+        headers[header] = env.request.headers[header]
+      end
+    end
+
+    begin
+      YT_POOL.client &.get(url, headers) do |response|
+        env.response.status_code = response.status_code
+        response.headers.each do |key, value|
+          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+            env.response.headers[key] = value
+          end
+        end
+
+        env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+        if response.status_code >= 300
+          env.response.headers.delete("Transfer-Encoding")
+          break
+        end
+
+        proxy_file(response, env)
+      end
+    rescue ex
+    end
+  end
+
+  def self.options_storyboard(env)
+    env.response.headers["Access-Control-Allow-Origin"] = "*"
+    env.response.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS"
+    env.response.headers["Access-Control-Allow-Headers"] = "Content-Type, Range"
+  end
+
+  def self.get_storyboard(env)
+    authority = env.params.url["authority"]
+    id = env.params.url["id"]
+    storyboard = env.params.url["storyboard"]
+    index = env.params.url["index"]
+
+    url = "/sb/#{id}/#{storyboard}/#{index}?#{env.params.query}"
+
+    headers = HTTP::Headers.new
+
+    headers[":authority"] = "#{authority}.ytimg.com"
+
+    REQUEST_HEADERS_WHITELIST.each do |header|
+      if env.request.headers[header]?
+        headers[header] = env.request.headers[header]
+      end
+    end
+
+    begin
+      YT_POOL.client &.get(url, headers) do |response|
+        env.response.status_code = response.status_code
+        response.headers.each do |key, value|
+          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+            env.response.headers[key] = value
+          end
+        end
+
+        env.response.headers["Connection"] = "close"
+        env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+        if response.status_code >= 300
+          env.response.headers.delete("Transfer-Encoding")
+          break
+        end
+
+        proxy_file(response, env)
+      end
+    rescue ex
+    end
+  end
+
+  # ??? maybe also for storyboards?
+  def self.s_p_image(env)
+    id = env.params.url["id"]
+    name = env.params.url["name"]
+
+    url = env.request.resource
+
+    headers = HTTP::Headers{":authority" => "i9.ytimg.com"}
+    REQUEST_HEADERS_WHITELIST.each do |header|
+      if env.request.headers[header]?
+        headers[header] = env.request.headers[header]
+      end
+    end
+
+    begin
+      YT_POOL.client &.get(url, headers) do |response|
+        env.response.status_code = response.status_code
+        response.headers.each do |key, value|
+          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+            env.response.headers[key] = value
+          end
+        end
+
+        env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+        if response.status_code >= 300 && response.status_code != 404
+          env.response.headers.delete("Transfer-Encoding")
+          break
+        end
+
+        proxy_file(response, env)
+      end
+    rescue ex
+    end
+  end
+
+  def self.yts_image(env)
+    headers = HTTP::Headers.new
+    REQUEST_HEADERS_WHITELIST.each do |header|
+      if env.request.headers[header]?
+        headers[header] = env.request.headers[header]
+      end
+    end
+
+    begin
+      YT_POOL.client &.get(env.request.resource, headers) do |response|
+        env.response.status_code = response.status_code
+        response.headers.each do |key, value|
+          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+            env.response.headers[key] = value
+          end
+        end
+
+        env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+        if response.status_code >= 300 && response.status_code != 404
+          env.response.headers.delete("Transfer-Encoding")
+          break
+        end
+
+        proxy_file(response, env)
+      end
+    rescue ex
+    end
+  end
+
+  def self.thumbnails(env)
+    id = env.params.url["id"]
+    name = env.params.url["name"]
+
+    headers = HTTP::Headers{":authority" => "i.ytimg.com"}
+
+    if name == "maxres.jpg"
+      build_thumbnails(id).each do |thumb|
+        if YT_POOL.client &.head("/vi/#{id}/#{thumb[:url]}.jpg", headers).status_code == 200
+          name = thumb[:url] + ".jpg"
+          break
+        end
+      end
+    end
+    url = "/vi/#{id}/#{name}"
+
+    REQUEST_HEADERS_WHITELIST.each do |header|
+      if env.request.headers[header]?
+        headers[header] = env.request.headers[header]
+      end
+    end
+
+    begin
+      YT_POOL.client &.get(url, headers) do |response|
+        env.response.status_code = response.status_code
+        response.headers.each do |key, value|
+          if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
+            env.response.headers[key] = value
+          end
+        end
+
+        env.response.headers["Access-Control-Allow-Origin"] = "*"
+
+        if response.status_code >= 300 && response.status_code != 404
+          env.response.headers.delete("Transfer-Encoding")
+          break
+        end
+
+        proxy_file(response, env)
+      end
+    rescue ex
+    end
+  end
+end